Patent application number | Description | Published |
20100048083 | METHOD OF MANUFACTURING SPARK PLUG - A process for forming a glass seal layer in a spark plug, comprising an inserting step of inserting a terminal electrode into an axial hole in an insulator, a hot compression step of pushing the terminal electrode in a heated state to thereby compress the glass powder mixture, and a cooling step of performing cooling to thereby form the glass seal layer. | 02-25-2010 |
20100233929 | METHOD OF MANUFACTURING SPARK PLUG - A decrease in yield and degradation of productivity can be avoided when a spark plug having an insulator with low mechanical strength is manufactured. In a second process, a terminal electrode | 09-16-2010 |
20100264823 | SPARK PLUG - A spark plug with excellent vibration resistance performance and resistor load life-span characteristics, and a reduced diameter which is achieved by strengthening adhesion between a resistor and a conductive glass sealing layer. | 10-21-2010 |
20110204766 | SPARK PLUG - A spark plug ( | 08-25-2011 |
20120013241 | SPARK PLUG - The object of the invention is to provide a spark plug including a central electrode and/or a ground electrode, which can suppress generation of corrosion-like generated foreign substances while maintaining high thermal conductivity and high strength. | 01-19-2012 |
Patent application number | Description | Published |
20080267371 | TELEPHONE SYSTEM AND COMMUNICATION TERMINAL - According to one embodiment, telephone system includes terminals can make telephone communication, call processor sets links connecting terminals at outgoing callers and terminals at incoming callers in response to outgoing call requests, and status manager manages statuses of terminals, wherein the terminal comprises display displays information, display controller displays a list of partner's destinations of communication of user registered in advance onto display, call processor reports outgoing call request for setting link between a terminal selected by user from list and a terminal of user to call processor, acquisition processor acquires status information showing statuses of terminals regarding partner's destinations on list, and management processor manages security levels of links set between terminal of user and terminals of partner's destinations on list on the basis of status information, and display controller displays security levels on display by associating with each of security levels of partner's destinations on list. | 10-30-2008 |
20090168642 | TELEPHONE SYSTEM, AND NODE DEVICE AND REROUTING METHOD FOR THE SYSTEM - According to one embodiment of the invention, there is provided a telephone system comprises nodes connected to a first network of a packet exchange type and a second network of a volume-based charging type. The nodes mutually form a communication route. The system comprises terminal devices each connected to any one of the nodes and configured to mutually perform telephone communication via the route. Each of the nodes comprises a detector monitors a state of first network to detect failure in the first network, a reroute processor reroutes a part of the route into second network via a relay node to be an interface between the networks to avoid the detected failure, and a decision processor decides a relay node to minimize a cost required for the route to pass the second network. The reroute processor reroutes the route via the relay node decided by the decision processor. | 07-02-2009 |
20090300197 | Internet Protocol Communication System, Server Unit, Terminal Device, and Authentication Method - According to one embodiment, there is provided an Internet Protocol communication system provided with terminal devices configured to mutually communicate with one another via an IP network and a server unit which performs digest authentication in response to authentication requests transmitted from the terminal device. The server unit comprises an authentication processing module which transmits challenge values to terminal devices of authentication request sources, and verifies response values returned to the challenge values, and a determination module which determines results of the digest authentication on the basis of the results of the verification. At least one of the terminal devices comprises an authentication client module which generates the response values by using a defined algorithm in accordance with user passwords input by users, and with device passwords stored in advance, and returns the response values to the server unit. | 12-03-2009 |
Patent application number | Description | Published |
20080235381 | MESSAGE RELAYING APPARATUS, COMMUNICATION ESTABLISHING METHOD, AND COMPUTER PROGRAM PRODUCT - A storage unit of a relaying apparatus stores first identification information that identifies an SIP terminal and second identification that identifies other SIP terminal which is forecast as a transfer destination of a message. A transmitting-and-receiving unit receives from the SIP terminal a request message that is received before a transfer message to be transferred to other SIP terminal and that includes a processing request concerning communications and the first identification information. An obtaining unit obtains from a storage unit the second identification information corresponding to the first identification information included in the received request message. A connection establishing unit establishes communications between the other SIP terminal of the obtained second identification information and the relaying apparatus. | 09-25-2008 |
20090016339 | APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR RELAYING MESSAGES - A call-forwarding destination judging unit included in an SIP proxy estimates whether call forwarding will be required, based on the type of an SIP message. When it has been estimated that call forwarding will be required, the call-forwarding destination judging unit also estimates the destination of the call forwarding. With this arrangement, when the delivery of the SIP message requires call forwarding, it is possible to establish, in advance, a TLS connection with the SIP terminal being the destination of the call forwarding. Thus, it is possible to eliminate the need to establish the TLS connection at the time when the call is actually forwarded. | 01-15-2009 |
20090025079 | COMMUNICATION SYSTEM FOR AUTHENTICATING OR RELAYING NETWORK ACCESS, RELAYING APPARATUS, AUTHENTICATION APPARATUS, AND COMMUNICATION METHOD - A switching equipment stores identification information of communication established with respect to an infrastructure network system in a storage unit, and when an access request is received from a terminal device, the switching equipment adds the stored identification information to the access request and transfers the access request to a 1× Radius server. When the terminal device having requested the access is authenticated, the 1× Radius server notifies a PANA PAA of address information of the terminal device associated with the identification information added to the access request. The PANA PAA approves the same network access as the switching equipment with respect to the terminal device in the received address information. | 01-22-2009 |
20090109963 | Apparatus, method, and computer program product for registering user address information - The storage unit stores therein authentication IDs that are used for authentication of users and address information in association with one another. The authentication processing unit receives from a PC an authentication message that includes an authentication ID and is used for the authentication of the user of a communication terminal, and performs authentication on the user based on the received authentication message. The SIP address acquiring unit acquires from the storage unit address information that corresponds to the authentication ID included in the authentication message when the user is authenticated. The SIP address registering unit sends the SIP location server a registration request for registering the acquired address information as the address information of the user of the IP telephone terminal associated with the PC that transmits the authentication message. | 04-30-2009 |
20090238172 | IP PHONE TERMINAL, SERVER, AUTHENTICATING APPARATUS, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND RECORDING MEDIUM - A transfer unit transfers a message between a network and an external terminal. An input unit inputs a user ID for identifying a user. A generating unit generates a registration message requesting a registration of address information of the user. A transmitting unit transmits the registration message to a server. A receiving unit receives a response message including registration information and connection information from the server. When the connection information indicates a permission of a connection of the external terminal to the network, a control unit controls the transfer unit to transfer the message between the network and the external terminal. | 09-24-2009 |
Patent application number | Description | Published |
20110133626 | SPARK PLUG FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SAME - A spark plug having sufficient durability for an internal combustion engine is provided by restraining a sharp increase in resistance of a resistor while the size of the spark plug is reduced. The spark plug comprises an insulator having an axial hole, a metallic shell provided on the outer circumference of the insulator, a center electrode inserted into a front end portion of the axial hole, a terminal electrode inserted into a rear end portion of the axial hole, and a ground electrode. A circular columnar resistor is disposed within the axial hole between the center electrode and the terminal electrode, thereby electrically connecting the center electrode and the terminal electrode. The resistor is composed of carbon black serving as a conductive material, a glass powder, and ceramic particles. The ceramic particles have a maximum particle size of 0.5 μm or less. | 06-09-2011 |
20110248620 | SPARK PLUG FOR INTERNAL COMBUSTION ENGINE - Provided is a spark plug which allows a predetermined resistance to be imparted to a resistor with restraint of variation in resistance of the resistor and in turn, enables enhancement of yield. The spark plug includes a ceramic insulator having an axial hole extending in the direction of an axis CL | 10-13-2011 |
20130026903 | SPARK PLUG - An electrode tip located at an distal end of an electrode of a spark plug comprises Pd as a predominant component in an amount of 40 wt. % or more; at least one element of Ir, Ni, Co, and Fe, wherein, when the tip contains Ir, the amount of Ir is 0.5 wt. % to 20 wt. %, and when the tip contains at least one element of Ni, Co, and Fe, the amount of the at least one element is 0.5 wt. % to 40 wt. %; and at least one element of Pt, Re, Rh, and Ru in a total amount of 5 wt. % to 40 wt. %, wherein when the tip contains at least one element of Re, Rh, and Ru, the amount of the at least one element is 10 wt. % or less, and when the tip contains Pt, the amount of Pt is 16 wt. % to 40 wt. %. The electrode tip, which comprises Pd as the main component, has improved resistance to spark-caused wear and reduced occurrence of separation and cracking of the tip. | 01-31-2013 |
Patent application number | Description | Published |
20120217864 | SPARK PLUG - A spark plug having an insulator that can be restrained from cracking in an environment of heating and cooling cycles. The spark plug includes an insulator having an axial bore extending in the direction of the axis, and a center electrode held in one end portion of the axial bore. The center electrode has an outer layer, and a core provided within the outer layer and formed from a material higher in thermal conductivity than the outer layer. After a heat treatment, the outer layer has a high-hardness region having a hardness of 190 Hv or higher and a thickness of 30 μm to 200 μm, and an element supply region having a thickness of 50 μm or more. | 08-30-2012 |
20120256530 | SPARK PLUG - A spark plug including a center electrode and a ground electrode having a core portion and an outer layer covering the core portion, the core portion being formed from a material having a thermal conductivity higher than that of the outer layer. At least a portion in which thickness of the outer layer is 0.5 mm or less is present at a cross-section perpendicular to a direction in which the ground electrode is extended. Further, the composition of the electrode material forming the outer layer is as follows: Ni is 96 mass % or more, total of at least one kind selected from Y and rare earth elements is 0.05 mass % or more, Al is 0.5 mass % or less, and Si is 0.5 mass % or more and 1.5 mass % or less, where the total of Ni, Y, rare earth elements, Al, Si does not exceed 100 mass %. | 10-11-2012 |
20120293061 | SPARK PLUG - A spark plug including a center electrode and a ground electrode having a gap between the center electrode and the ground electrode, the ground electrode has an outer layer which is formed from an Ni-based alloy and a core portion which is covered by the outer layer and formed from a material having a thermal conductivity higher than that of the outer layer. Further, the melting point of the Ni-based alloy forming the outer layer is 1150° C. or more and 1350° C. or less. | 11-22-2012 |
20130069516 | SPARK PLUG - A spark plug includes a ceramic insulator, a center electrode, a metallic shell, and a ground electrode. The center electrode has a shoulder portion at a forward end portion, which tapers forward with respect to the axial direction. A noble metal tip is joined to the forward end portion of the center electrode through a fusion zone. A spark discharge gap is formed between the noble metal tip and the ground electrode. The shortest distance between the fusion zone and a forward end surface of the noble metal tip is 0.8-1.2 mm. The outside diameter of the fusion zone as measured at a forward end of the fusion zone is smaller than that as measured at a rear end of the fusion zone. An acute angle θ | 03-21-2013 |
20130181596 | SPARK PLUG ELECTRODE, METHOD FOR PRODUCING SAME, SPARK PLUG, AND METHOD FOR PRODUCING SPARK PLUG - A spark plug includes at least one of a center electrode or a ground electrode that is produced by the steps of: mixing a matrix metal with carbon so that the carbon content of the resultant mixture is adjusted to 80 vol. % or less; subjecting the mixture to powder compacting or sintering, to thereby form a core; placing the core in a cup formed of nickel or a metal containing nickel as a main component; and subjecting the cup to cold working. The thus-produced electrode exhibits favorable thermal conductivity and good heat dissipation, by virtue of the small difference in thermal expansion coefficient between the core and an outer shell. The spark plug including the above electrode exhibits excellent durability. | 07-18-2013 |
20130181597 | SPARK PLUG ELECTRODE, METHOD FOR PRODUCING SAME, SPARK PLUG, AND METHOD FOR PRODUCING SPARK PLUG - A spark plug is provided having at least one of a center electrode or a ground electrode. The electrode comprises: a core formed of a composite material containing a matrix metal, the matrix metal being copper or a metal containing copper as a main component, and carbon dispersed in the matrix metal in an amount of 10 to 80 vol. %, the carbon having a thermal conductivity higher than that of the matrix metal. The electrode also contains an outer shell which surrounds the core and which is formed of nickel or a metal containing nickel as a main component. The thus-produced electrode exhibits favorable thermal conductivity and good heat dissipation, by virtue of the small difference in thermal expansion coefficient-between the core and an outer shell. The spark plug including the above electrode exhibits excellent durability. | 07-18-2013 |
20130200774 | SPARK PLUG AND MANUFACTURING METHOD THEREFOR - A spark plug includes a ceramic insulator having an axial hole formed in an axis direction of the spark plug, a center electrode inserted in a front side of the axial hole, a metal shell disposed around the ceramic insulator and a ground electrode joined to a front end portion of the metal shell, wherein the ground electrode has a cross-sectional area of 2.0 mm | 08-08-2013 |
20130264939 | SPARK PLUG - A spark plug having a connecting portion that electrically connects a center electrode with a metal terminal within an axial bore in an insulator. The connecting portion of the spark plug includes a resistor. A center electrode-side resistance, which is the resistance of a portion of the resistor that extends from the center thereof toward the center electrode in the axial direction, is larger than a metal terminal-side resistance, which is the resistance of a portion of the resistor that extends from the center thereof toward the metal terminal. | 10-10-2013 |